[Freeswitch-users] Japanese TTS for Linux - anybody?

I've been looking for a TTS system I could use with FreeSWITCH which runs on Linux and has acceptable quality voices in Japanese, German and English. Cepstral would fit the bill, except there don't seem to be any Japanese voices at all. Neospeech would be fine, but for a strictly personal installation it is financially out of reach (USD 950.-- per year per voice). And the other engines I found run on Windows. Does anybody on the list know about a TTS system which would run on Linux, support Japanese voices and have a price tag of no more than a one-time cost of $200? Thanks, Kurt